Get top most UIViewController

Question

I can t seem to get the top most UIViewController without access to a UINavigationController  Here is what I have so far   UIApplication sharedApplication   keyWindow  rootViewController  presentViewController vc  animated  true  completion  nil    However  it does not seem to do anything  The keyWindow and rootViewController seem to be non-nil values too  so the optional chaining shouldn t be an issue   NOTE  It is a bad idea to do something like this  It breaks the MVC pattern

User · Answer

Based on Dianz answer  the Objective-C version  -  UIViewController    topViewController      UIViewController  baseVC   UIApplication sharedApplication keyWindow rootViewController     if   baseVC isKindOfClass  UINavigationController class             return   UINavigationController   baseVC  visibleViewController           if   baseVC isKindOfClass  UITabBarController class             UIViewController  selectedTVC     UITabBarController  baseVC  selectedViewController         if  selectedTVC               return selectedTVC                    if  baseVC presentedViewController           return baseVC presentedViewController          return baseVC

User · Answer

To find the visible viewController in Swift 3  if let viewControllers   window  rootViewController  childViewControllers         let prefs   UserDefaults standard       if viewControllers viewControllers count - 1  is ABCController          print   ABCController  is visible               This code find the last added or the last active controller visible   This I have used in AppDelegate to find active view Controller

User · Answer

have this extension  Swift 2    extension UIApplication       class func topViewController controller  UIViewController    UIApplication sharedApplication   keyWindow  rootViewController  - gt  UIViewController            if let navigationController   controller as  UINavigationController               return topViewController navigationController visibleViewController                    if let tabController   controller as  UITabBarController               if let selected   tabController selectedViewController                   return topViewController selected                                  if let presented   controller  presentedViewController               return topViewController presented                    return controller           Swift 3  extension UIApplication       class func topViewController controller  UIViewController    UIApplication shared keyWindow  rootViewController  - gt  UIViewController            if let navigationController   controller as  UINavigationController               return topViewController controller  navigationController visibleViewController                    if let tabController   controller as  UITabBarController               if let selected   tabController selectedViewController                   return topViewController controller  selected                                  if let presented   controller  presentedViewController               return topViewController controller  presented                    return controller           You can you use this anywhere on your controller  if let topController   UIApplication topViewController

User · Answer

Too many flavours but none an iterative elaborated one  Combined from the previous ones        func topMostController   - gt  UIViewController            var from   UIApplication shared keyWindow  rootViewController         while  from    nil                if let to    from as  UITabBarController   selectedViewController                   from   to               else if let to    from as  UINavigationController   visibleViewController                   from   to               else if let to   from  presentedViewController                   from   to               else                   break                                 return from

User · Answer

import UIKit  extension UIApplication           MARK  Choose keyWindow as per your choice     var currentWindow  UIWindow            connectedScenes          filter   0 activationState     foregroundActive            map   0 as  UIWindowScene            compactMap   0            first  windows          filter   0 isKeyWindow   first               MARK  Choose keyWindow as per your choice     var keyWindow  UIWindow            UIApplication shared windows first    0 isKeyWindow              class func topMostViewController base  UIViewController    UIApplication shared currentWindow  rootViewController  - gt  UIViewController             if let nav   base as  UINavigationController               return topMostViewController base  nav visibleViewController                     if let tab   base as  UITabBarController               let moreNavigationController   tab moreNavigationController              if let top   moreNavigationController topViewController  top view window    nil                   return topMostViewController base  top                else if let selected   tab selectedViewController                   return topMostViewController base  selected                                  if let presented   base  presentedViewController               return topMostViewController base  presented                    return base

User · Answer

Slight Variation on  AlberZou using a computed variable rather than a function  extension UIViewController     var topMostViewController   UIViewController        if let presented   self presentedViewController         return presented topMostViewController            if let navigation   self as  UINavigationController         return navigation visibleViewController  topMostViewController    navigation            if let tab   self as  UITabBarController         return tab selectedViewController  topMostViewController    tab            return self        extension UIApplication     var topMostViewController   UIViewController        return self keyWindow  rootViewController  topMostViewController         Then say  if let topViewControler   UIApplication shared topMostViewController           do stuff

User · Answer

Based on Bob -c above    Swift 3 0  extension UIWindow         func visibleViewController   - gt  UIViewController            if let rootViewController  UIViewController    self rootViewController               return UIWindow getVisibleViewControllerFrom vc  rootViewController                    return nil            class func getVisibleViewControllerFrom vc UIViewController  - gt  UIViewController            if vc isKind of  UINavigationController self                 let navigationController   vc as  UINavigationController             return UIWindow getVisibleViewControllerFrom  vc  navigationController visibleViewController              else if vc isKind of  UITabBarController self                 let tabBarController   vc as  UITabBarController             return UIWindow getVisibleViewControllerFrom vc  tabBarController selectedViewController              else                if let presentedViewController   vc presentedViewController                    return UIWindow getVisibleViewControllerFrom vc  presentedViewController                 else                    return vc

User · Answer

presentViewController shows a view controller  It doesn t return a view controller  If you re not using a UINavigationController  you re probably looking for presentedViewController and you ll need to start at the root and iterate down through the presented views   if var topController   UIApplication sharedApplication   keyWindow  rootViewController       while let presentedViewController   topController presentedViewController           topController   presentedViewController               topController should now be your topmost view controller     For Swift 3    if var topController   UIApplication shared keyWindow  rootViewController       while let presentedViewController   topController presentedViewController           topController   presentedViewController               topController should now be your topmost view controller     For iOS 13   let keyWindow   UIApplication shared windows filter   0 isKeyWindow  first  if var topController   keyWindow  rootViewController       while let presentedViewController   topController presentedViewController           topController   presentedViewController           topController should now be your topmost view controller

User · Answer

var topViewController  UIViewController            guard var topViewController   UIApplication shared keyWindow  rootViewController else   return nil           while let presentedViewController   topViewController presentedViewController               topViewController   presentedViewController                   return topViewController

User · Answer

iOS13           top Most view Controller extension UIViewController       func topMostViewController   - gt  UIViewController           if self presentedViewController    nil               return self                   if let navigation   self presentedViewController as  UINavigationController               return navigation visibleViewController  topMostViewController                     if let tab   self presentedViewController as  UITabBarController               if let selectedTab   tab selectedViewController                   return selectedTab topMostViewController                             return tab topMostViewController                     return self presentedViewController  topMostViewController            extension UIApplication       func topMostViewController   - gt  UIViewController            return UIWindow key  rootViewController  topMostViewController            extension UIWindow       static var key  UIWindow            if  available iOS 13                   return UIApplication shared windows first    0 isKeyWindow             else               return UIApplication shared keyWindow                      use let vc   UIApplication shared topMostViewController       End top Most view Controller

User · Answer

you can define a UIViewController variable in AppDelegate  and in every viewWillAppear set the variable to self  however dianz answer is the best answer    override func viewWillAppear animated  Bool        super viewWillAppear animated      let appDel   UIApplication sharedApplication   delegate as  AppDelegate     appDel currentVC   self

User · Answer

I loved  dianz s answer  and so here is the swift 3 s version of it  It s basically the same thing but his was missing a curly brace and some of the syntax variable method names have changed  So here it is   extension UIApplication       class func topViewController base  UIViewController    UIApplication shared keyWindow  rootViewController  - gt  UIViewController            if let nav   base as  UINavigationController               return topViewController base  nav visibleViewController                    if let tab   base as  UITabBarController               if let selected   tab selectedViewController                   return topViewController base  selected                                  if let presented   base  presentedViewController               return topViewController base  presented                    return base           Usage is still the exact same though   if let topController   UIApplication topViewController         print  The view controller you re looking at is    topController

User · Answer

extension UIApplication            public var mainKeyWindow  UIWindow            return windows first where     0 isKeyWindow       keyWindow            public var rootViewController  UIViewController            guard let keyWindow   UIApplication shared mainKeyWindow  let rootViewController   keyWindow rootViewController else               return nil                   return rootViewController            public func topViewController controller  UIViewController    UIApplication shared rootViewController  - gt  UIViewController             if controller    nil               return topViewController controller  rootViewController                             if let navigationController   controller as  UINavigationController               return topViewController controller  navigationController visibleViewController                     if let tabController   controller as  UITabBarController               if let selectedViewController   tabController selectedViewController                   return topViewController controller  selectedViewController                                   if let presentedViewController   controller  presentedViewController               return topViewController controller  presentedViewController                     return controller          Swift 5 2 and above

User · Answer

In a very rare case  with custom segue  the top most view controller is not in a navigation stack or tab bar controller or presented  but its view is inserted to the top of key windown s subviews    In such situation  it s necessary to check if UIApplication shared keyWindow subviews last    self view to determine if the current view controller is the top most

User · Answer

For Swift 5   iOS 13  extension UIViewController       static func topMostViewController   - gt  UIViewController            if  available iOS 13 0                   let keyWindow   UIApplication shared windows filter   0 isKeyWindow  first             return keyWindow  rootViewController  topMostViewController                              return UIApplication shared keyWindow  rootViewController  topMostViewController                  func topMostViewController   - gt  UIViewController            if let navigationController   self as  UINavigationController               return navigationController topViewController  topMostViewController                     else if let tabBarController   self as  UITabBarController               if let selectedViewController   tabBarController selectedViewController                   return selectedViewController topMostViewController                             return tabBarController topMostViewController                                  else if let presentedViewController   self presentedViewController               return presentedViewController topMostViewController                              else               return self                    Usage  When you are getting topMostViewController without instance of UIViewController guard let viewController   UIViewController topMostViewController   else   return   print viewController   When you are getting topMostViewController of instance of UIViewController let yourVC   UIViewController   guard let vc   yourVC topMostViewController   else   return   print vc

User · Answer

extension UIWindow        func visibleViewController   - gt  UIViewController            if let rootViewController  UIViewController   self rootViewController               return UIWindow getVisibleViewControllerFrom vc  rootViewController                    return nil            static func getVisibleViewControllerFrom vc UIViewController  - gt  UIViewController           if let navigationController   vc as  UINavigationController              let visibleController   navigationController visibleViewController                return UIWindow getVisibleViewControllerFrom  vc  visibleController             else if let tabBarController   vc as  UITabBarController              let selectedTabController   tabBarController selectedViewController               return UIWindow getVisibleViewControllerFrom vc  selectedTabController             else               if let presentedViewController   vc presentedViewController                   return UIWindow getVisibleViewControllerFrom vc  presentedViewController                else                   return vc                                   Usage   if let topController   window visibleViewController         println topController

User · Answer

For swift 4   5   to get topmost viewController     MARK  UIApplication extensions  extension UIApplication        class func getTopViewController base  UIViewController    UIApplication shared keyWindow  rootViewController  - gt  UIViewController             if let nav   base as  UINavigationController               return getTopViewController base  nav visibleViewController             else if let tab   base as  UITabBarController  let selected   tab selectedViewController               return getTopViewController base  selected             else if let presented   base  presentedViewController               return getTopViewController base  presented                    return base           How to use  if let topVC   UIApplication getTopViewController        topVC view addSubview forgotPwdView

User · Answer

The best solution for me is an extension with a function   Create a swift file with this extension  First is the UIWindow extension    public extension UIWindow       var visibleViewController  UIViewController            return UIWindow visibleVC vc  self rootViewController             static func visibleVC vc  UIViewController   - gt  UIViewController            if let navigationViewController   vc as  UINavigationController               return UIWindow visibleVC vc  navigationViewController visibleViewController            else if let tabBarVC   vc as  UITabBarController               return UIWindow visibleVC vc  tabBarVC selectedViewController            else               if let presentedVC   vc  presentedViewController                   return UIWindow visibleVC vc  presentedVC                else                   return vc                                   inside that file add function  func visibleViewController   - gt  UIViewController        let appDelegate   UIApplication shared delegate     if let window   appDelegate  window           return window  visibleViewController           return nil     And if you want to use it  you can call it anywhere   Example      override func viewDidLoad         super viewDidLoad         if let topVC   visibleViewController                    show some label or text field            File code is like this    import UIKit  public extension UIWindow       var visibleViewController  UIViewController            return UIWindow visibleVC vc  self rootViewController             static func visibleVC vc  UIViewController   - gt  UIViewController            if let navigationViewController   vc as  UINavigationController               return UIWindow visibleVC vc  navigationViewController visibleViewController            else if let tabBarVC   vc as  UITabBarController               return UIWindow visibleVC vc  tabBarVC selectedViewController            else               if let presentedVC   vc  presentedViewController                   return UIWindow visibleVC vc  presentedVC                else                   return vc                                  func visibleViewController   - gt  UIViewController        let appDelegate   UIApplication shared delegate     if let window   appDelegate  window           return window  visibleViewController           return nil

User · Answer

in SWIFT 5 2 you can use underneath code  import UIKit  extension UIWindow       static func getTopViewController   - gt  UIViewController            if  available iOS 13                  let keyWindow   UIApplication shared windows filter   0 isKeyWindow  first                          if var topController   keyWindow  rootViewController                   while let presentedViewController   topController presentedViewController                       topController   presentedViewController                                   return topController                         else               if var topController   UIApplication shared keyWindow  rootViewController                   while let presentedViewController   topController presentedViewController                       topController   presentedViewController                                   return topController                                 return nil

User · Answer

https   gist github com db0company 369bfa43cb84b145dfd8 I did some tests on the answers and comments on this site  For me  the following works  extension UIViewController       func topMostViewController   - gt  UIViewController            if let presented   self presentedViewController               return presented topMostViewController                      if let navigation   self as  UINavigationController               return navigation visibleViewController  topMostViewController      navigation                    if let tab   self as  UITabBarController               return tab selectedViewController  topMostViewController      tab                return self          extension UIApplication       func topMostViewController   - gt  UIViewController            return self keyWindow  rootViewController  topMostViewController             Then  get the top viewController by   UIApplication shared topMostViewController

User · Answer

Where did you put the code in   I try your code in my demo  I found out  if you put the code in       func application application  UIApplication  didFinishLaunchingWithOptions launchOptions   NSObject  AnyObject    - gt  Bool      will fail  because key window have been setting yet    But I put your code in some view controller s   override func viewDidLoad       It just works

User · Answer

For anyone looking for a swift 5 iOS 13  solution  keywindow is deprecated since iOS 13   extension UIApplication        class func getTopMostViewController   - gt  UIViewController            let keyWindow   UIApplication shared windows filter   0 isKeyWindow  first         if var topController   keyWindow  rootViewController               while let presentedViewController   topController presentedViewController                   topController   presentedViewController                           return topController           else               return nil

User · Answer

class func topViewController controller  UIViewController    UIApplication shared keyWindow  rootViewController  - gt  UIViewController            if let navigationController   controller as  UINavigationController               return topViewController controller  navigationController visibleViewController                    if let tabController   controller as  UITabBarController               if let selected   tabController selectedViewController                   return topViewController controller  selected                                  if let presented   controller  presentedViewController               return topViewController controller  presented                    return controller

User · Answer

Use this code to find top most UIViewController  func getTopViewController   - gt  UIViewController        var topController  UIViewController    UIApplication shared keyWindow  rootViewController     while topController  presentedViewController    nil           topController   topController  presentedViewController           return topController

User · Answer

extension UIViewController       func topMostViewController   - gt  UIViewController           if self presentedViewController    nil               return self                   if let navigation   self presentedViewController as  UINavigationController               return navigation visibleViewController topMostViewController                     if let tab   self presentedViewController as  UITabBarController               if let selectedTab   tab selectedViewController                   return selectedTab topMostViewController                             return tab topMostViewController                     return self presentedViewController  topMostViewController            extension UIApplication       func topMostViewController   - gt  UIViewController            return self keyWindow  rootViewController  topMostViewController

[swift] Get top most UIViewController

Examples related to swift

Examples related to uiviewcontroller